Mitsubishi Electric MU-A08ND-c1 Service Manual Download Page 2

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TECHNICAL CHANGES

MU-09SN -

➔

MU-A08ND -

1. Compressor has been changed. (RH-130NGDT

➔

2R10S3R236A-6B)

2. Outdoor fan motor has been changed. (RA6N23-AA

➔

RA6N33-AA)

3. Compressor capacitor has been changed.
4. Outdoor fan motor capacitor has been changed.

MU-10SN -

➔

MU-A10ND -

1. Outdoor unit model has been changed.

•Valve cover has been added.
•Dimension has been changed. (780W

540H

255D

➔

800W

550H

285D)

2. Compressor has been changed. (RH145NGCT

➔

RH145NHNT)

3. Outdoor fan motor has been changed. (RA6N33-AA

➔

RA6N21-AB)

4. Compressor capacitor has been changed.
5. Outdoor fan motor capacitor has been changed.
6. Outdoor heat exchanger has been changed. (

[

9.52 L-Bend

➔

[

7 Flat)

MU-12SN -

➔

MU-A12ND -

1. Outdoor unit model has been changed.

•Valve cover has been added.
•Dimension has been changed. (780W

540H

255D

➔

800W

550H

285D)

2. Compressor has been changed. (RH167NHDT

➔

RH174NHNT)

3. Outdoor fan motor has been changed. (RA6N33-AA

➔

RA6N30-BA)

4. Compressor capacitor has been changed.
5. Outdoor fan motor capacitor has been changed.
6. Outdoor heat exchanger has been changed. (

[

9.52 L-Bend

➔

[

7 Flat)

MU-15SN -

➔

MU-A15ND -

1. Compressor has been changed. (RH-207NHDT

➔

RH207NRAT)

2. Outdoor fan motor has been changed. (RN6N50-BA

➔

RA6V60-MA)

3. Compressor capacitor has been changed.
4. Outdoor fan motor capacitor has been changed.

MU-A08ND -

➔

MU-A08ND -

MU-A15ND -

➔

MU-A15ND -

1. Valve cover has been added.

MU-A10ND -

➔

MU-A10ND -

1. Outdoor heat exchanger has been changed.
2. Capillary tube has been changed.

Revision A:

• MU-A08ND -

and MU-A15ND -

have been added.

Revision B:

• MU-A10ND -

has been added.

• RoHS PARTS LIST has been added.

OB403B--1.qxp 07.6.26 10:28 AM Page 2

Summary of Contents for MU-A08ND-c1

Page 1: ...els SPLIT TYPE AIR CONDITIONERS MU A08ND MU A08ND MU A10ND MU A10ND MU A12ND MU A15ND MU A15ND C2 C1 C1 C2 C1 C2 C1 MU A10ND MU A12ND TM Revision B MU A10ND has been added RoHS PARTS LIST has been added C2 Please void OB403 REVISED EDITION A NOTE This service manual describes technical data of outdoor units RoHS compliant products have G mark on the spec name plate For servicing of RoHS compliant ...

Page 2: ...hanged Valve cover has been added Dimension has been changed 780Wo540Ho255D 800Wo550Ho285D 2 Compressor has been changed RH167NHDT RH174NHNT 3 Outdoor fan motor has been changed RA6N33 AA RA6N30 BA 4 Compressor capacitor has been changed 5 Outdoor fan motor capacitor has been changed 6 Outdoor heat exchanger has been changed 9 52 L Bend 7 Flat MU 15SN MU A15ND 1 Compressor has been changed RH 207N...

Page 3: ...ND MU A15ND Air inlet Piping Drain hose Air outlet Drain outlet back and side MU A10ND MU A12ND Air inlet Piping Drain hose Air outlet Drain outlet back and side MU A10ND back MU A12ND Air inlet Piping Drain hose Air outlet Drain outlet back and side ...

Page 4: ...LK RED 111 850o605o290 42 52 865 1 6 520 MS56 Electrical data Fan motor Special remarks Compressor Capacity MU A08ND 2 2 0 5 1656 19 2 39 0 36 3 44 2R10S3R236A 6B 470 C R 4 09 C S 5 58 RA6N33 AA WHT BLK 150 BLK RED 265 780o540o255 28 45 700 0 8 260 ATM0S M60 MU A10ND 2 9 1 2 1896 26 3 86 0 26 3 12 RH145NHNT 700 C R 2 74 C S 3 78 RA6N21 AB WHT BLK 384 BLK RED 259 32 46 820 0 6 1 1 300 MS56 1 MU A12...

Page 5: ... mm 100mm or more 100mm or more 100mm or more 350mm or more REQUIRED SPACE 400mm or more OUTDOOR UNIT MU A08ND C1 Unit mm OUTDOOR UNIT MU A08ND C2 320 25 4 3 3 5 104 320 285 255 Service panel Gas refrigerant pipe joint Refrigerant pipe flared 9 52 Liquid refrigerant pipe joint Refrigerant pipe flared 6 35 Airout Air in Air in Service port 155 90 81 74 260 10 780 500 122 40 540 109 32 110 147 Drain...

Page 6: ...T MU A10ND MU A12ND 4 3 3 5 10 69 800 302 5 500 150 22 3 Handle 550 280 164 5 99 5 170 5 23 Service panel Service port 285 344 5 44 400 Air in Air out Air in MU A 10ND 17 5 Bolt pitch for installation 304 325 40 Liquid refrigerant pipe joint Refrigerant pipe flared 6 35 Gas refrigerant pipe joint Refrigerant pipe flared 9 52 MU A10ND Refrigerant pipe flared 12 7 MU A12ND 2 holes 10X21 Basically op...

Page 7: ...61 Gas refrigerant pipe joint Refrigerant pipe flared 12 7 Liquid refrigerant pipe joint Refrigerant pipe flared 6 35 30o 35o Drainage 3 holes 33 Air out Air in Air in 248 35 350 50 290 310 345 20 355 90 Drainage hole 16 2 100mm or more REQUIRED SPACE 350mm or more 500mm or more 100mm or more 100mm or more ...

Page 8: ...UPPLY 220 230V N 60Hz CONNECTING TO INDOOR UNIT BRN BLU BLU BLU 1 4 51C WHT WHT BLK WHT RED WHT F1 F2 220 230V 220 230V MU A10ND MU A12ND SYMBOL C1 C2 SYMBOL F MC SYMBOL MF TB1 TB2 NAME NAME NAME COMPRESSOR CAPACITOR OUTDOOR FAN CAPACITOR FUSE 3 15A COMPRESSOR INNER PROTECTOR OUTDOOR FAN MOTOR INNER FUSE TERMINAL BLOCK NOTE 1 About the indoor side electric wiring refer to the indoor unit electric ...

Page 9: ... MC SYMBOL MF TB1 TB2 NAME NAME NAME COMPRESSOR CAPACITOR OUTDOOR FAN CAPACITOR FUSE 3 15A COMPRESSOR INNER PROTECTOR OUTDOOR FAN MOTOR INNER PROTECTOR TERMINAL BLOCK NOTE 1 About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing 2 Use copper conductors only For field wiring 3 Symbols below indicate Terminal block Connector CONNECTING TO INDOOR UNIT R S...

Page 10: ...ion 12 7 with heat insulator Flared connection Flared connection MU A12ND Unit mm MU A10ND Refrigerant flow in cooling Capillary tube 3 0 x 1 6 x 500 MU A10ND 3 0 x 1 6 x 850 MU A10ND Compressor Stop valve with service port Stop valve Strainer 100 Outdoor heat exchanger C1 C2 Refrigerant pipe Option 6 35 with heat insulator Refrigerant pipe Option 9 52 with heat insulator Flared connection Flared ...

Page 11: ...t pipe Option 12 7 with heat insulator Outdoor heat exchanger Capillary tube 3 0x 1 8x700 Refrigerant pipe Option 6 35 with heat insulator Refrigerant flow in cooling Stop valve with service port Compressor Flared connection Flared connection Stop valve ...

Page 12: ...ion of the air conditioner under normal conditions Since operating conditions vary according to the areas where these units are installed The following information has been provided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve 1 GUARANTEED VOLTAGE 198 253V 60Hz 2 AIR FLOW Air flow should be set at MAX 3 MAIN READINGS 1 Indo...

Page 13: ...Wet and dry bulb thermometers Wet and dry bulb thermometers How to measure the indoor air wet dry bulb temperature difference 1 Attach at least 2 sets of wet and dry bulb thermometers to the indoor air intake as shown in the figure and at least 2 sets of wet and dry bulb thermometers to the indoor air outlet The thermometers must be attached to the position where air speed is high 2 Attach at leas...

Page 14: ...ature C Ambient humidity Outdoor low pressure Outdoor unit current A kgf F Gauge MPa Gauge 15 20 50 25 60 30 70 35 2 0 2 5 3 0 3 5 4 0 220V 18 32 15 20 50 25 60 30 70 35 0 4 0 5 0 6 0 7 0 8 220V 4 0 5 0 6 0 7 0 8 0 9 0 0 9 18 32 MU A10ND MU A10ND Outdoor low pressure Ambient temperature C Ambient humidity Ambient temperature C Ambient humidity Outdoor unit current A kgf F Gauge MPa Gauge 15 32 18 ...

Page 15: ...r unit operates in only Test run operation Outdoor unit doesn t operate even in Test run operation Indoor unit operates when the EMERGENCY OPERATION switch is pressed Indoor unit doesn t operate when the EMERGENCY OPERATION switch is pressed Check room temperature thermistor Refer to Test point diagram and voltage Check of wiring diagram of outdoor unit Refer to Check of remote controller and rece...

Page 16: ...arts Part name Check method and criterion Figure R C S RED BLK WHT MAIN AUX R C S RED BLK WHT MAIN AUX P MU A10 12 15ND MU A08ND P P INNER PROTECTOR Measure the resistance between the terminals with a tester Coil wiring temperature 10 C 40 C Color of lead wire Normal WHT BLK BLK RED 102 126 97 120 MU A15ND 132 162 233 286 MU A08ND 338 414 228 280 MU A10ND 275 337 224 276 MU A12ND Measure the resis...

Page 17: ...ism Detaching points Connector Sleeve Locking lever 9 1 MU A08ND OUTDOOR UNIT OPERATING PROCEDURE PHOTOS 1 Removing the cabinet 1 Remove the screws of the top panel 2 Remove the screws of the service panel 3 Remove the screw of the valve cover MU A08ND 4 Remove the screws of the cabinet 5 Remove the screws of the front panel and motor support 6 Remove the service panel and remove the screw from th...

Page 18: ...4 Remove the lead clamps and the outdoor fan motor lead wires 5 Remove the screws fixing the outdoor fan motor 6 Remove the outdoor fan motor Photo 5 Suction pipe Discharge pipe Compressor nuts 4 Removing the compressor 1 Remove the cabinet Refer to 1 2 Remove the relay panel 3 Remove the soundproof felt 4 Remove the terminal cover on the compressor 5 Disconnect lead wires from the glass terminal ...

Page 19: ...ng the back panel 9 Remove the back panel Photo 1 Photo 3 Screws of the top panel Screws of the cabinet Screws of the cabinet Photo 2 Screws of the front panel and motor support Screws of the top panel Service panel Screw of the cabinet Direction to remove Hooks Screw of the service panel 2 Removing the electrical parts 1 Remove the service panel and the cabinet Refer to 1 2 Remove the following p...

Page 20: ... motor Photo 5 Propeller Propeller nut Outdoor fan motor Set screws of the outdoor fan motor Hook Relay panel Outdoor fan motor lead wires Set screws of the outdoor fan motor 4 Removing the compressor 1 Remove the cabinet Refer to 1 2 Remove the screws fixing the relay panel 3 Remove the soundproof felt 4 Remove the terminal cover 5 Pull out the lead wires from the glass terminal of the com presso...

Page 21: ...xing the service panel 4 Pull down the service panel and remove it 5 Remove the screws fixing the cabinet 6 Remove the cabinet 7 Disconnect the indoor outdoor connecting wire 8 Remove the screws fixing the back panel 9 Remove the back panel Photo 1 Screws of the cabinet Screws of the front panel and motor support Photo 3 Screws of the top panel Service panel Screw of the cabinet Direction to remov...

Page 22: ...he outdoor fan motor 5 Remove the outdoor fan motor 4 Removing the compressor 1 Remove the cabinet Refer to 1 2 Remove the relay panel 3 Remove the soundproof felt 4 Remove the terminal cover 5 Pull out the lead wires from the glass terminal of the com pressor 6 Recover gas from the refrigerant circuit NOTE Recover gas from the pipes until the pressure gauge shows 0 kg cm2 0MPa 7 Disconnect the we...

Page 23: ...sor capacitor C1 Outdoor fan capacitor C2 Terminal block TB Photo 1 Photo 3 Photo 2 Screws of the cabinet Screws of the cabinet Screws of the service panel Compressor capacitor C1 9 4 MU A15ND OUTDOOR UNIT Outdoor fan capacitor C2 Terminal block TB Connector 3 Removing the outdoor fan motor 1 Remove the cabinet Refer to 1 2 Disconnect the connector and remove the hooked lead wire from the fan moto...

Page 24: ... felt 5 Recover gas from the refrigerant circuit NOTE Recover gas from the pipes until the pressure gauge shows 0 kg cm2 0MPa 6 Disconnect the welded part of the discharge pipe 7 Disconnect the welded part of the suction pipe 8 Remove nuts fixing the compressor 9 Remove the compressor Photo 5 Compressor Discharge pipe Suction pipe Compressor nuts OPERATING PROCEDURE Terminal cover ...

Page 25: ... 1 1 1 1 TOP PANEL MOTOR SUPPORT OUTDOOR HEAT EXCHANGER CABINET GRILLE PROPELLER OUTDOOR FAN MOTOR COMPRESSOR COMPRESSOR RUBBER SET BASE BASE STOP VALVE GAS STOP VALVE LIQUID VALVE COVER SERVICE PANEL BACK PANEL BACK PANEL TERMINAL BLOCK TERMINAL BLOCK COMPRESSOR CAPACITOR OUTDOOR FAN CAPACITOR CAPILLARY TUBE OVERCURRENT RELAY FUSE HOLDER F1 FUSE HOLDER F2 FUSE FUSE C1 C2 E02 815 297 E02 336 515 E...

Page 26: ...26 10 2 OUTDOOR UNIT STRUCTURAL PARTS ELECTRICAL PARTS AND FUNCTIONAL PARTS MU A10ND MU A12ND 1 2 15 18 10 9 3 4 5 6 7 8 16 17 19 20 11 13 14 This figure shows MU A12ND 12 PARTS LIST non RoHS compliant ...

Page 27: ... F 1 1 1 1 1 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Symbol in Wiring Diagram Q ty unit Remarks Part No No Part Name CABINET CABINET GRILLE PROPELLER BASE BASE COMPRESSOR COMPRESSOR COMPRESSOR RUBBER SET STOP VALVE GAS STOP VALVE GAS STOP VALVE LIQUID SERVICE PANEL BACK PANEL BACK PANEL TERMINAL BLOCK TERMINAL BLOCK OUTDOOR FAN CAPACITOR OUTDOOR FAN CAPACI...

Page 28: ...2 817 521 E02 141 501 E02 139 515 E02 075 506 E02 783 901 E02 816 290 E02 A17 290 E02 140 661 E02 139 662 E02 819 650 E02 817 245 E02 795 374 E02 798 374 E02 895 351 E02 900 353 E02 818 301 E02 077 937 E02 895 383 E02 127 382 E07 001 241 BACK PANEL BACK PANEL OUTDOOR HEAT EXCHANGER OUTDOOR HEAT EXCHANGER CABINET GRILLE PROPELLER MOTOR SUPPORT COMPRESSOR RUBBER SET COMPRESSOR BASE BASE STOP VALVE G...

Page 29: ...ORT OUTDOOR HEAT EXCHANGER CABINET GRILLE PROPELLER OUTDOOR FAN MOTOR COMPRESSOR COMPRESSOR RUBBER SET BASE BASE STOP VALVE GAS STOP VALVE LIQUID VALVE COVER SERVICE PANEL BACK PANEL BACK PANEL TERMINAL BLOCK TERMINAL BLOCK COMPRESSOR CAPACITOR OUTDOOR FAN CAPACITOR CAPILLARY TUBE OVERCURRENT RELAY FUSE HOLDER F1 FUSE HOLDER F2 FUSE FUSE C1 C2 E12 815 297 E12 336 515 E12 336 630 E12 815 232 E12 81...

Page 30: ...30 11 2 OUTDOOR UNIT STRUCTURAL PARTS ELECTRICAL PARTS AND FUNCTIONAL PARTS MU A10ND MU A12ND 1 2 15 18 10 9 3 4 5 6 7 8 16 17 19 20 11 13 14 This figure shows MU A12ND 12 RoHS PARTS LIST RoHS compliant ...

Page 31: ...1 1 1 1 1 1 1 1 1 1 1 1 1 1 Symbol in Wiring Diagram Q ty unit Remarks No Part Name CABINET CABINET GRILLE PROPELLER BASE BASE COMPRESSOR COMPRESSOR COMPRESSOR RUBBER SET STOP VALVE GAS STOP VALVE GAS STOP VALVE LIQUID STOP VALVE LIQUID SERVICE PANEL BACK PANEL BACK PANEL TERMINAL BLOCK TERMINAL BLOCK OUTDOOR FAN CAPACITOR OUTDOOR FAN CAPACITOR COMPRESSOR CAPACITOR SEPARATOR SEPARATOR MOTOR SUPPOR...

Page 32: ...9 515 E12 075 506 E12 783 901 E12 816 290 E12 A17 290 E12 140 661 E12 139 662 E12 819 650 E12 817 245 E12 795 374 E12 798 374 E12 895 351 E12 900 353 E12 818 301 E12 077 937 E12 895 383 E12 127 382 E17 001 241 BACK PANEL BACK PANEL OUTDOOR HEAT EXCHANGER OUTDOOR HEAT EXCHANGER CABINET GRILLE PROPELLER MOTOR SUPPORT COMPRESSOR RUBBER SET COMPRESSOR BASE BASE STOP VALVE GAS STOP VALVE LIQUID VALVE C...

Page 33: ... 12 7 1 2 MU A08ND MU A08ND MU A10ND MU A10ND MU A12ND MU A15ND MU A15ND Pipe length Cross section Part No Model A Gas B Liquid Pipe size O D mm in Insulation D C REFRIGERANT PIPES The air conditioner has flared connections its indoor and outdoor sides Please use the optional extension pipe as follows ...

Page 34: ...34 ...

Page 35: ...35 ...

Page 36: ...ELECTRIC ENGINEERING CO LTD Distributed in Jul 2007 No OB403 REVISED EDITION B 7 Distributed in Oct 2005 No OB403 REVISED EDITION A 6 Reprinted in Apr 2005 No OB403 100 Distributed in Apr 2005 No OB403 6 Made in Japan New publication effective Jul 2007 Specifications subject to change without notice TM ...

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